Cold rolling facility and cold rolling method

Patent metadata

Field	Value
Publication number	US-2016339493-A1
Application number	US-201515114540-A
Country	US
Kind code	A1
Filing date	Jan 9, 2015
Priority date	Jan 29, 2014
Publication date	Nov 24, 2016
Grant date	—

Abstract

A cold rolling facility includes: a heating device; a tandem mill including a plurality of rolling mills; a meandering-amount measuring unit; a meandering-movement correction device; a shape measuring unit; a shape controller configured to control a shape of a steel sheet after being cold-rolled by the rolling mill located on the uppermost stream side; and a controller configured to control operations of the meandering-movement correction device based on a measurement value of a meandering-movement amount of the steel sheet by the meandering-amount measuring unit to control a meandering movement of the steel sheet before being heated, and configured to control operations of the shape controller based on a measurement value of a shape of the steel sheet by the shape measuring unit to control the meandering movement of the steel sheet that is attributed to cold rolling of the steel sheet by the tandem mill.

First claim

1 - 6 . (canceled)

7 . A cold rolling facility comprising:
a heating device configured to heat sequentially-transferred steel sheets; a tandem mill including a plurality of rolling mills aligned in a transfer direction of the steel sheets and configured to sequentially cold-roll the heated steel sheets; a meandering-amount measuring unit configured to measure a meandering amount of each of the steel sheets before being heated by the heating device; a meandering-movement correction device configured to correct meandering movement of the steel sheet before being heated; a shape measuring unit configured to measure the shape of the steel sheet after being cold-rolled by the rolling mill located on an uppermost stream side in the tandem mill; a shape controller configured to control the shape of the steel sheet after being cold-rolled by the rolling mill located on the uppermost stream side; and a controller configured to control operations of the meandering-movement correction device based on a measurement value of the meandering-movement amount of the steel sheet by the meandering-amount measuring unit to control the meandering movement of the steel sheet before being heated, and configured to control operations of the shape controller based on the measurement value of the shape of the steel sheet by the shape measuring unit to control the meandering movement of the steel sheet that is attributed to cold rolling of the steel sheet by the tandem mill.

8 . The cold rolling facility according to claim 7 , wherein
the meandering-movement correction device is located on the upstream side of the heating device in the transfer direction of the steel sheets, and the meandering-amount measuring unit is located between the meandering-movement correction device and the heating device.

9 . The cold rolling facility according to claim 7 , wherein
the heating device includes:
C-shaped inductors each of which inserts thereinto respective edge portions in a width direction of the steel sheet in a sandwiched and spaced apart manner in a thickness direction of the steel sheet, wherein
the heating device heats both the edge portions of the steel sheet by induction heating.

10 . The cold rolling facility according to claim 8 , wherein
the heating device includes:
C-shaped inductors each of which inserts thereinto respective edge portions in a width direction of the steel sheet in a sandwiched and spaced apart manner in a thickness direction of the steel sheet, wherein
the heating device heats both the edge portions of the steel sheet by induction heating.

11 . A cold rolling method of heating sequentially-transferred steel sheets by a heating device, and sequentially cold-rolling the heated steel sheets by a tandem mill including a plurality of rolling mills aligned in a transfer direction of the steel sheets, the cold rolling method comprising:
measuring a meandering-movement amount of each of the steel sheets before being heated by the heating device, and the shape of the steel sheet after being cold-rolled by the rolling mill located on an uppermost stream side in the tandem mill; and controlling meandering movement of the steel sheet before being heated based on a measurement value of the meandering-movement amount of the steel sheet, and controlling meandering movement attributed to cold rolling of the steel sheet based on the measurement value of the shape of the steel sheet.

12 . The cold rolling method according to claim 11 , wherein the measuring measures the meandering-movement amount of the steel sheet before being heated, by a meandering-movement amount measuring unit arranged between the heating device and a meandering-movement correction device that is arranged on the upstream side of the heating device in the transfer direction of the steel sheet and corrects the meandering movement of the steel sheet before being heated.

13 . The cold rolling method according to claim 11 , further comprising:
heating, by induction heating, both edge portions of the steel sheet in a width direction of the steel sheet whose meandering movement is controlled at the controlling, by using the heating device provided with C-shaped inductors each of which inserts thereinto the respective edge portions of the steel sheet in a width direction of the steel sheet in a sandwiched and spaced apart manner in a thickness direction of the steel sheet.

14 . The cold rolling method according to claim 12 , further comprising:
heating, by induction heating, both edge portions of the steel sheet in a width direction of the steel sheet whose meandering movement is controlled at the controlling, by using the heating device provided with C-shaped inductors each of which inserts thereinto the respective edge portions of the steel sheet in a width direction of the steel sheet in a sandwiched and spaced apart manner in a thickness direction of the steel sheet.

Assignees

• Jfe Steel Corp

Inventors

• Ueno Masayasu
• Harada Yoshimitsu
• Kodama Hidemasa
• Fukushima Tatsuhito

Classifications

• B21C51/00

  Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F · CPC title

• B21B2273/14

  Front end or leading end · CPC title

• B21B2273/04

  Lateral deviation, meandering, camber of product · CPC title

• B21B2271/02

  Roll gap, screw-down position, draft position · CPC title

• B21B45/004

  Heating the product · CPC title